For people who live out of town, spec maps and announcements are huge. People spend a lot of money on tickets, hotels, air fare to visit HHN. Universal knows IPs get people through the gate. Unless you are living in an HHN bubble most people are not deciding to go this year because Legends Collide was announced. The past couple events I flew down twice because someone had to see Stranger things , Ghostbusters or Beetlejuice etc. As we stand now I have one trip booked with my wife and a bunch of people who want to go if Stranger Things/random IP is there.